ASTM F136 Ti-6Al-4V ELI Titanium Wire Description
What is ASTM F136 Ti-6Al-4V ELI Titanium Wire?
ASTM F136 Ti-6Al-4V ELI titanium wire is a high-performance extra-low interstitial variant of the conventional Ti-6Al-4V aerospace alloy. It features ultra-stringent control over interstitial elements including oxygen, nitrogen, carbon and iron, fully complying with the authoritative ASTM F136 international specification for medical surgical implant applications.
It maintains the excellent high-strength properties of standard Grade 5 titanium wire while achieving significantly enhanced fracture toughness and low-temperature ductility, outperforming conventional aerospace-grade Ti-6Al-4V materials. With precisely restricted impurity content (O ≤ 0.13%, N ≤ 0.05%, C ≤ 0.08%, Fe ≤ 0.25%) and a refined uniform alpha-beta microstructure, it delivers outstanding fatigue resistance and structural stability.
Thanks to its superior biocompatibility, exceptional low-temperature mechanical performance and reliable toughness, it finds broad applications in medical implant devices, precision surgical instruments and cryogenic aerospace components, perfectly catering to high-standard scenarios requiring biosafety and extreme low-temperature operational stability.
Technical Specifications
1.Diameter ranges
- Common sizes: 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0 mm.
- Fine sizes for precision applications: 0.1, 0.15, 0.2, 0.3, 0.4 mm.
2.Surface Treatment
|
Surface type |
Process |
Characteristics |
Best for |
|
Pickled |
HF+HNO₃ acid immersion |
Matte silver-gray, oxide-free, uniform |
Medical implants, general wire |
|
Bright |
Pickling+polishing |
Mirror-like, smooth |
Precision surgical instruments |
|
Drawn |
As-drawn from dies |
Natural metal, fine lines |
High-strength fasteners |
3.Production Process & Equipment
- World-class line: Imported Danieli continuous rolling line for Ti/Ni/Zr alloy wires.
- Ultra-high straightness: φ5 mm wire straightness deviation ≤ 2/1000.
- Mass production ready: Stable supply with full-scale production capability.
4.Aviation-grade manufacturing process:
- Vacuum melting ensures high purity and stable composition.
- Multi-pass cold drawing (bright drawing or pickling) results in a clean and bright surface.
- Precision straightening guarantees straightness of ≤ 2/1000 for aviation use.
- Roller die cold drawing controls dimensional accuracy and grain structure.
- Full-process inspection ensures dimensional accuracy, surface quality and mechanical properties.
5.Basic Product Information
|
Item |
Details |
|
Product name |
Ti-6Al-4V ELI Titanium Wire |
|
Equivalent |
Grade 23 (ASTM), TA4 (Chinese, near), Ti-6Al-4V ELI |
|
Execution standards |
ASTM F136, ASTM F620, ISO 5832-3, AMS 4907 (reference) |
|
Supply form |
Straight wire, coil wire |
|
Surface condition |
Pickled, bright, drawn |
6.Chemical Composition (ASTM F136):
|
Element |
Ti |
Al |
V |
Fe |
C |
N |
H |
O |
|
Content % |
Balance |
5.5-6.75 |
3.5-4.5 |
≤0.25 |
≤0.08 |
≤0.05 |
≤0.012 |
≤0.13 |
7.Comparison: Standard Grade 5 vs ELI (Grade 23)
|
Element |
Grade 5 (AMS 4928) |
Grade 23 ELI (ASTM F136) |
|
Oxygen (O) |
≤ 0.20% |
≤ 0.13% |
|
Iron (Fe) |
≤ 0.30% |
≤ 0.25% |
|
Hydrogen (H) |
≤ 0.015% |
≤ 0.012% |
8.Mechanical Properties (Annealed Condition)
|
Condition |
Tensile strength (MPa) |
Yield strength (MPa) |
Elongation (%) |
Hardness HV |
|
Annealed (M) |
860–980 |
795–860 |
≥ 12 |
280–320 |
9.Physical Properties
|
Item |
Value |
|
Density |
4.51 g/cm³ |
|
Elastic modulus |
110 GPa |
|
Melting point |
~1668 ℃ |
|
Magnetism |
Non-magnetic |
Product Features
- Extra-low interstitials: Tighter control of O, N, C, Fe for improved ductility and fracture toughness.
- High strength: Comparable to standard Grade 5 (860-980 MPa).
- Superior cryogenic performance: Excellent toughness at low temperatures (-253℃).
- Good weldability: Suitable for welding and 3D printing.
- Excellent biocompatibility: Proven performance in long-term surgical implants.
- Non-magnetic: Safe for MRI applications.
Key Applications
1) Medical (Primary)
- Orthopedic implants (bone screws, plates, hip stems, spinal rods).
- Dental implants and abutments.
- Surgical instruments and tools.
- Cardiovascular devices and pacemaker components.
2) Super-low temperature & Aerospace
- Liquid hydrogen and oxygen systems.
- Super-low temperature storage components.
- High-performance fasteners for low-temperature service.
Quality Assurance
- Manufactured in strict accordance with ASTM F136 industrial and aerospace specifications.
- Every production batch is supplied with an official Material Test Report (MTR) for full material traceability.
- Our multi-level quality inspection includes chemical analysis, mechanical testing, dimensional verification and surface condition inspection.
- Custom sizes, surface finishes and tempers (M, Y) are available upon inquiry.